Malicious PDF — malware analysis report

Static analysis result for SHA-256 878fb4f51328426c…

MALICIOUS

PDF

42.8 KB Created: 2021-05-10 20:31:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8de7da54603447a640c9894ada9e1a8c SHA-1: 8a3ef97703048d4214aa5253a509da7120e6f078 SHA-256: 878fb4f51328426c8ea6c4d72d4d51add3e0581e7524d43640be257d88452f70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector for a "free generator / game hack". The document body and heuristics indicate a lure for game-related cheats, likely to lead users to a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to potentially harmful content, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/free-25-spins-coin-master-links-game-hack In PDF document text
    • http://www.imwd.it/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/roblox-weird_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/real-robux_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://www.imwd.it/images/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://www.imwd.it/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004736.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4736 27264 bytes
SHA-256: 61faf8c143c4e14571cbd846ae42abe16c40ab08f70fc99f8ba5038f78e52a6f
font_01_sfnt_off000084b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B8 18316 bytes
SHA-256: 7fa45621bf9a4728c899947fc0d1a2becd31993fea733f0a04eabb1660a2ec34

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